VSX SERIES STEAMER - SERVICE PROCEDURES
Page 19 of 80
4. Remove the stem locking nut to remove the
stem from the valve body.
5. All parts are now accessible for inspection and
cleaning.
NOTE:
If internal solenoid parts appear to be
damaged or worn, then replace the solenoid valve.
Do not reuse damaged or worn parts. No internal
solenoid parts are available as a service
replacement. Pay careful attention to proper
orientation and placement of parts during
reassembly.
A. Check rubber seal on bottom of plunger.
B. Check plunger spring.
C. Check O-ring in valve body.
D. Check ports in valve body.
6. Reverse procedure to install.
Water Not Being Supplied to Boiler
Turn the steamer on. Check that water supply is
available to the steamer. After approximately 10
minutes, if no water is observed in the water level
gauge sight glass, then check for a problem with the
water solenoid valve or water level control probe.
WARNING:
DISCONNECT THE ELECTRICAL
POWER TO THE MACHINE AT THE MAIN
CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT
BOX INDICATING THE CIRCUIT IS BEING
SERVICED.
Scalants may be covering the water level control
probe giving a false indication of a sufficient water
level in the boiler. Detach, remove and thoroughly
clean the water level probe and canister assembly
to remove scalants and lime build up. This condition
indicates extremely poor water quality being
supplied to the boiler and/or boiler clean out/and
deliming has not been performed. The water
condition must be cleared up immediately with a
proper water conditioner to avoid further problems
with the steamer. Replace the water level probes
and canister assembly. Perform a boiler clean-out
and deliming procedure. See “BOILER”.
Water may be draining through an open boiler
blowdown solenoid valve as quickly as it’s fed to the
boiler. Loose wiring, a burned out coil or particles of
scale trapped in the valve seat may prevent the
valve from closing.
Newer steamer models use a plunger type rod that
raises and lowers to permit steam/water flow out of
boiler. If debris has accumulated around the water
orifice, the plunger may not seat properly to close
off the opening. If this symptom is suspect, remove
the solenoid as outlined in “FILL AND COLD
WATER SOLENOID VALVES”. Remove any debris
found on sealing surfaces, reassemble and install. If
the solenoid valve still does not function properly,
replace it with a new valve and check for proper
operation.
Older steamer models have a movable blade and
when closed, the blade reacts as a guillotine that
should be free to move fully down into the valve
pocket (projection at bottom of valve) so that the
pierced hole in the blade aligns perfectly with the
body opening. If debris has accumulated in the
bottom of the valve pocket, then the blade will not
move into the pocket completely. If this symptom is
suspect, remove the solenoid as outlined in “FILL
AND COLD WATER SOLENOID VALVES”.
NOTE:
On this valve body, remove the two
assembly bolts holding the brass body together and
remove the loose internal parts. Remove any debris
found on sealing surfaces, reassemble and install. If
the solenoid valve still does not function properly,
replace it with a new valve and check for proper
operation.
Blowdown Solenoid Valve Does Not Drain
If your steamer has an automatic blowdown drain
valve.
Older Models
- when the blowdown timer button is
pressed, the boiler blowdown valve opens. If your
steamer has a manual blowdown drain valve, close
the valve.
Newer Models
- are equipped with normally open
solenoid valves that close when energized by the
main power switch. When the main power switch is
turned off, the solenoid valve is de-energized and
the boiler blowdown valve re-opens.
The water contained in the boiler, being under
pressure, should be blown through this valve and be
noticeably visible exhausting out the steamer drain.
If the blowdown operation appears to function
sluggishly or not at all, considerable scalants may
be lodged in the drain pipe and/or the valve.
Disconnect the valve from the drain line and inspect
both the valve and the drain pipe fixed to the boiler.
If considerable scalants or lime build up is apparent,
then not only the valve, but also the boiler and water
level control must be thoroughly cleaned. See “FILL
AND COLD WATER SOLENOID VALVES” for a
cleaning procedure of a solenoid valve and
"BOILER” for a cleaning procedure of the boiler.
